US Patent 8081444 Computer system with airflow guiding duct

A computer system includes a chassis and an airflow guiding duct. The chassis includes a chassis bottom wall, a chassis front wall and a chassis rear wall. The chassis front wall defines a first ventilation hole, and the chassis rear wall defines a second ventilation hole. A motherboard is secured to the chassis bottom wall between the chassis front wall and the chassis rear wall. A memory card is secured to the motherboard. The airflow guiding duct is secured in the chassis and includes an entrance portion. The entrance portion covers a portion of the memory card, so as to guide airflow. Airflow flows in the chassis via the first ventilation hole, over the memory card, and then out of the chassis via the second ventilation hole.